Electric lamp.



C. H. HSCHER.

ELECTRIC LAMP.

APPLICATION FILED MAR. 18. 1915.

1 1%@,89m Patented May 25, 1915.

Maine; ls. lnvgzari flQ MM UNTTED flTATEfl PATENT @FFTQE.

CHARLES HARRY FISCHER, OF CINCINNATI, OHIO.

ELECTRIC LAMP.

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bulb from the outside or from the inside of the lamp body, and for maintaining the bulb in adjusted position.

It is the object of my invention further to provide novel means for manually shifting the light-bulb with relation to the. reflector by rotative or axial or combined ro tative and axial movements, so as to position the lightbulb in or out of the focus of the reflector as may provide nova-l coacting means for maintaining the light-bulb in adjusted positions; further to provide novel means in the space between the casing and reflector for holding the socket-member coacting with the plug of the light-bulb and with the plug of the electric connection against rotation during the attachment of these plugs to the socketmember, socket-member is limited and the rotative movement thereof is prevented during such The casing of the lamp is shown at 11, and

attaching.

My present invention is an improvement on the device shown, described and claimed in my Patent No. 1,114,976, dated October 27, 1914..

I do not herein broadly claim the complement-a1 means for maintaining the socketmember in adjusted positions,having shown, described and claimed the same in an application for Letters Patent on improvements in electric lamps, executed of even date herewith, and being Serial No. 14,214, and filed in the United States Patent Office on the 13th day of March, 1915.

The invention will be further readily understood from the following description and claims, and from the drawings, in which latter:

Figure 1 is an axial section of an electric lamp embodying my invention. Fig. 2 is a perspective view showing the means for at- Specification of Letters Patent.

be desired; further to whereby the axial movement of the.

Patented May 25,1915.

Application filed March 13, 1915. Serial No. 14,215.

taching and focusing the electric light-bulband for attaching the connector-plug, the parts being shown in separated relation. Fig. 3 is a side elevation of my improved device in assembled relation, the reflector and easing being partly broken away. Fig. .4: is

showing the socket-member in rear position with its stop received in one of the recesses in the flange. .Fig. 5 is a front elevation of my improved device with the casing partly broken away and the reflector a similar view,

and light-bulb removed. Fig. 6 is a rear elevation of my improved device, with the reflector partly broken away and the casing and connector-plug removed. Fig. 7 is an axial section of my improved device, partly broken away,- taken on a line corresponding to the line 77 of Fig. 5, the socket-member being shown in forward position with its limiting stop in frictional contact with the 7 wall of the reflector-opening. Fig. 8 is a cross-section of my improved device taken on the line8-8 of Fig. 3. Fig. 9 is a perspective view of the spring-member showing the contact-surface of its shoe; and, Fig. 10

is an enlarged cross-sectional detail of the socket-member.

I do not herein claim the means for supporting and insulating the central electric terminal post ing shown, described and claimed the same in an application for patent on electric connectors, filed July 17, 1914, Serial No.

the reflector at 12. The reflector is exemplified as a parabolic reflector secured to the casing by screws 13 for forming the body of the lamp as a double-walled body between the walls of which there is the space 14. Y

The front closure of the lamp is shown at 15, exemplified as a door provided with a glass 16. The door is suitably mounted on the body, as by hinges 17, or the casing, reflector and door may. be suitably connected together in other manner, so that, if it is desired to have ready access to the light-bulb, shown at 18, the front glass 16 of the electric connector, hav- I maybe removed, in order that the 'adjustlight-bulb is to be effected from the outside of the casingfthe door of the lamp or its 1 glass may, if desired, be more firmly ataperture 23 of the amp casing.

space 14, and is shown on a flange piece, 25 rigidly secured to the casing, as by solder, ing. The wall of the aperture 22 is prefef metal of the reflector rearwardly for 'fr'nf nreceiving the pins 31 20 means at its forward end, shown as bayonet v tached to the body of the lamp.

,My present invention is more particularly directed to adjusting the position of the light-bulb from the outside of the casing.

I A socket-member is provided to which the electric light-bulb is arranged to be secured, this socket -'member being instanced; as a socket-tube 21 received aperture 22 of the reflector and a central rear A flange 24 extends forwardly from the cas the ably strengthened bylslightly turnin in an annular bent edge 26. v he socket-member. has bulb attaching slots 27, in the wall of the tube arranged for receiving pins 28 of the plug 29 vof the electric light-bulb. The rear end of the socket-member is provided with connectorplug attaching means, shown as bayonet slots 30 in the wall of the tube arranged for of the connector plug 32.

- socket-member has movement, said resilient member and said socket-member having coiacting surfaces arranged for permitting all a said movements and for holding said socketmember in adjusted positions.

ances 19 and depressions 20, the depressions extending in a plurality ofidirections across each other for forming the-protuberances.

The coacting member for said surface is shown as ashoe 33 which is received through an opening 34 in the flange 24, and has an inner'end provided with protuberances 36 and depressions 37, eoacting with the protuberances and the depressions on the socketmemberr The shoe 1s mounted on a spring 38, shownas a band spring curved to be 7 received about the flange, the band preferably extending more than half way around the flange, so that it will be retained on said flange vby spring pressure and arranged to be releasably received thereabout. It preferably has-an outwardly turned end 39 for permitting the spring to'be readily pushed about the flange.

in 'a' central rear Thus thesocket-member is. provided with protuberv. ranged to be received socket memben'so that its terminal 48 will said socket-member.

an insulating washer 44 rigi the rsockejt-rnember. provided for the connector-plug andis arranged} to beinormally pressed toward the connect'or-plugby a post 45 being, slidable in the terminal post the posts 41 The spring'urges the shoe 33 toward the socket-member i for continuously maintainingresilient contact between said shoe and tubera'nces on one of said coacting positionmaintaining parts is preferably received in a plurality of the depressions of the other A plurality of proof said parts, so as to securely maintain said parts in relatively adjusted relations.

Av terminal post 41 is arranged to be pressed toward the light-bulb by a spring 42, thi v ost being shown as a sleeve slidable in'a busliing- 43 suitably rigidly secured in 1y positioned in -,A terminal post 45 is spring 46, the terminal 41'. The plug of the lamp-bulb is arranged to be received in its socket, sothatits terminal 47 will make electric connectionwith the post41, and the connector-plug is arin the outer end of the make electric connection with the' post 45, and 45 maintainingelectric connection with each other, and the springs 42 and 46 urging said 'postsfinto electric contact with the terminals of thelight-bulb andconnector-plug respectively 1 In attaching the light-bulb or the -con-.

nector-plug to thesocket-Inember, sufiicient pressure must be exerted thereupon manu-A' v ally to compress the respective springs 42 and 46, in orderthat the ,pins on said respec plugs may be received in the side slots v r tive of the respective bayonet slots of the socketmember. spring 38 and the coacting maintaining member may not the force exerted bulb or connectonplug with the socket-member. to be manually pushed The socket-member is therefore likely endwise in either di- The holding properties of the 1' I faces of the positioning means for the socketv be suficient to-counteractin so connecting the 'light-. I

rection respectivelyby the bulb or theconn-ector-plug. i

It is desirable to limit this axial movement of the socket-member in both dire'c its gui' es." of the socket-member I provide the same with an outwardly struck lip 49, located in the space between the casing and reflector,

the lip coacting' respectively with the flange iis. tions so gsto maintain the Socket-member in a I a In order to limit the movement 24extending from the case and the edge26 I of the reflector for limiting endwise ment of the socket-member.

I prefer to provide the edge 26 with one or more recesses 51 in which the lip 49'is received when the socket-member is pushed forwardly in attaching or detaching the connector-plug, the rotation of the, socketmember being prevented When the lip is received in one oi e 51, axial and rotative force ice manually i applied to the, connectorplug for forcing its pins into or out of bayonet connection at :the outer end of the socket-member.

ifhe inner end of the flange 24s is also preferahly provided With one or more simireceived ally pushed rearwardly during attachment tative movement lar recesses 52, in one of which the lip 49 is when the socket-member mantachment or detachment A slight reverse axial movement or the socket-member by pulling on the light-bulb or the connector-plug after the same are seated, will draw the lipout of the recess rear ends 'hemade tapering,

153, $4, whereby a Wedging oi Zfmemher in its guide against either the Wall bf the into which it has been forced ior again permitting the turning; the soclretmember.

If desired, the lip may at its forward and as shown the socket annular edge 26 orthevvall oi the liange'Q z may be effected upon axial movemnt of the socket-memher, for limitmrsaid .axial movement and also preventing its ro tative movement during attachment or detachlnent of the lighthulb or connectorplug, this Wedgmg action tel-ring place he tween said up and any point in the ci cumference. of said walls of said edge and flange respectively.

The axial, rotary, and combined l and rotary movements obtainahl'e in improved device afiord ease of manual manipulation of the light-hul s, the parts being so arranged however as to afford great resistance to unintentional shifting after adjustment lhe arrangement of my improved device whereby provision is made for imparting an axial movement, and a rotative movement, and a movement which is the sum of both said movements, to the light-bulb, hat is to say, for imparting movements to said light-bulb in any direction along or about the line of the principal axis of the reflector, enables me to adjust the light-bulb in such manneras to accommodate the position of the filament in the light-bulb to the reflector.

for instaice, in a or eating for placing line up or down or side any portion of the filament toward portion of the redector "for producing the best light results, and adjusting the filament into the focus of the reflector, "whereby the most eiicctive results may be ohtained.

l laving thus fully described my invention, What I claim as new and desire to secure by Letters Patent, is

l in an electric lamp, the combination of a casing, a reflector, a socket-member in the line or" the principal axis oi the reflector prevented during such at having arr-outer socket for a 'onnector-plug opening outwardly at said casing and an inner socket for a light-bulb opening inwardly at said reflector, and position-retaining means acting resiliently on said socket-member, whereby said socket-member is arranged to be manually moved from either end in any direction along or about said line of the principal axis of the redoctor and said 'position retaining means remaining automatically active for retaining said socket-member in adjusted positions.

2. In an electric lamp, the combination of a casing, a reflector, a socket-member in the line of the principal axis of the reflector having" a socket at each of its ends, a plug for each of said sockets, spring'pressed conmeeting means hetween'said socket-members and each of said plugs arranged to be connected by axial and rotary movements of said plugs, position-retaining means acting resiliently on said socket-member, whereby said socket-memher is arranged to be manually moved in any direction along or about the line of the principal axis of the reflector and said position-retaining means remaining automatically active for retaining said socket-morale r in adjusted position, andstopning means limiting movements of said socket-member in the directions of said axial and rotary movements of said plugs during connecting of said plugs.

3. in an electric lamp, the combination of a casing and a reflector constituting lampelements, said casing and reflector having a space therehetxveen, a socket-member having guiding means the space hetwcen said lamp-elements, said guiding means comprising a dense extending parallel to the line of the "principal axis of said reflector into said space from one of said lamp-elements, said socket-member provided with a connectorplus' socket at its casing end and With a light-bulb socket at its reflector end, and resiliently acting position-retaining means in said space, said last-named means and said socket-member provided With coacting retardent surtace formations extending in a plurality of directions for movement of said socket-member axially, rotatively, or in a direction which is the sum of said axial and rotative movements and automatically retaining said soclretniemher in adjusted positions.

4-. ln electric lamp, the combination of 1 a casing and a reflector constituting lampelements, said casing and reflector having a space therebetween, a socket-member having guiding means in the space between said lamp-elements, said guiding means compris- 2 ing flange extending in the line of the principal axis of the reflector into said space from one of said lamp-elements, said socket-member provided with a socket for a connector-plug at its casing end and with socket-member received a socket'for the plug of 1a light-bulb at its reflector end, resiliently, acting position-retaining means in said space, said last-named means and said socket-member provided with coacting retardent surface-formations extending in a plurality of directions for movement of said socket-member axially, rotatively, or in directions which are the sum of said axial and rotative movements and automatically retaining said socketmember in adjusted positions, and means for limiting axial and rotative movements of said socket-member for attachment. of said plugs.

5. In an electric lamp, the combination of a casing and a reflector of lamp-elements having a space therebetween, a flange extending into said space from one of said lamp-elements in the line of the principal axis of the reflector, a

in said flange, a resilient position-retaining means, said lastnamed means and said socket-member provided with coacting retardent surface-formations extending in a plurality of directions for movement of said socket-member axially, rotatively, or in directions which are the sum of said axial and rotative movements and automatically retaining said socket-member in adjusted positions, and a stop on said socket-member having a tapered end coacting with one of said lamp-elements.

6. In an electric lamp, the combination of a casing and a reflector constituting a pair of lamp-elements having a space therebetween, a flange extending into said space from one of said lamp-elements in the line of the principal axis of the reflector, a socket-member guided therein and provided with a socket at its casing end for-a connector-plug and with a socket at its reflector end for the plug of a light-bulb, said flange provided with an aperture, and a band- Goples of this patent may be obtained for 'flve cents constituting a pair 'provided with spring provided with a shoe, said bandsurface-formations.

7. In an electric lamp, the combination of a casing, and a reflector constituting a pair of lamp-elements having a space therebetween, a flange extending into said space from one of said lamp-elements in the line of the principal axis of the reflector, a socket-member guided therein and provided with a socket at its casing end for a connector-plug and with a socket at its reflector end for the plug of a light-bulb, said flange an aperture, and a bandspring removably received about said flange with said shoe located in said aperture, said socket-piece and shoe rovided with coacting retardent surfaceormations extending crossingly in a plurality of directions for movement of said socket-member in all directions along and about said principal axis of the reflector and for continuously urging coaction between said coacting retardent surface-formations, and said socket-member provided with a stop coacting with the end of said flange and the other of said lampelements. In testimony whereof, I have hereunto signed my name in the scribing witnesses.

CHARLES HARRY FISCHER.

Witnesses:

CHARLEs E. WEBER, THERESA M. SILBER.

each, by addressing the Commissioner of Patents.

Washington, D. 0.

presence of two sub- 

